You actually don't need any tools for this. They pop out easily, and without damage if you pull around the edges and pull one clip out at a time. I recently did mine and it worked perfectly. The dealerships just yank them straight out with one forceful pull. The total time to replace both kidneys was about 4 minutes. If they feel stuck, spray the clips with silicone and pull again. Easy!

I thought I had seen the dealer do that (not mine) and couldn't believe my eyes! Thanks for confirming i'm not nuts!